Tb Woods TB-6S178 Sleeve Coupling Spacer Flange Size 6

Product Description

The TB WOODS TB-6S178 is a Type S spacer flange designed for use in sleeve-style flexible couplings. Machined from high-strength cast iron, this flange ships bored to size at 1.875 inches for a slip fit on standard shafts. It carries a Size 6 coupling code and is rated to 6000 RPM. The flange diameter and outside diameter are both 4.0000 inches, with a hub end outside diameter of 4 inches and a length through bore of 1-9/16 inches. Maintenance mechanics and millwrights install these flanges in power transmission applications where easy removal and reinstallation are priorities. The Type S hub flange design simplifies servicing without disturbing connected equipment.

This spacer flange is used in industrial power transmission systems wherever a TB WOODS sleeve coupling Size 6 is specified. Typical applications include pumps, fans, compressors, and conveyors in light to moderate duty settings. Horsepower capacity varies by sleeve elastomer: 0.7 hp at 100 RPM with EPDM or Neoprene sleeves, and 2.9 hp at 100 RPM with Hytrel sleeves. The bored-to-size configuration fits standard shaft diameters without additional machining, making it ready for direct installation. It is suited to both new builds and replacement service on existing sleeve coupling assemblies.

Key Features

• High-strength cast iron construction for durability in industrial environments
• Bored to size at 1.875 inches for slip fit on standard shafts — no secondary machining required
• Type S spacer flange design allows removal without moving connected equipment
• Rated to 6000 RPM maximum speed
• Compatible with EPDM, Neoprene, and Hytrel sleeve elastomers at different horsepower ratings
• Size 6 coupling code for straightforward specification and replacement

Compatibility

Designed as an OEM-style replacement spacer flange for TB WOODS Size 6 sleeve coupling assemblies. Specific sleeve elastomer selection determines horsepower capacity: 0.7 hp at 100 RPM for EPDM and Neoprene, 2.9 hp at 100 RPM for Hytrel.

Installation Notes

Installation is typically performed by a millwright or mechanical maintenance technician. Disconnect and lock out all power to the driven equipment before handling coupling components. Verify shaft diameter matches the 1.875-inch bore before assembly, and inspect mating sleeve and opposing flange for wear before reinstalling. Follow applicable ANSI and OSHA machine guarding requirements after reassembly.

Technical Specifications

• Bore Diameter: 1.875 inches
• Bore Type: Bored to Size
• Flange Diameter: 4.0000 inches
• Outside Diameter: 4.0000 inches
• Hub End Outside Diameter: 4 inches
• Coupling Overall Length: 2-13/16 inches
• Length Through Bore: 1-9/16 inches
• Coupling Size Code: 6
• Hub Flange Type Code: S
• Hub Type: Spacer Flange
• Material: High-Strength Cast Iron
• Max RPM: 6000 rpm
• Horsepower at 100 RPM (EPDM and Neoprene): 0.7 hp
• Horsepower at 100 RPM (Hytrel): 2.9 hp

Standard Information

• Brand: TB WOODS
• Manufacturer Part Number: TB-6S178